A volume integral (VI) equation method based on the fast Fourier transform (FFT) is proposed for the electromagnetic simulation of complex systems in large magnetic confinement fusion (MCF) devices. Such FFT-VI allows for dramatically reducing the time and the human effort required to adapt the CAD input files to models suited for electromagnetic simulations. Moreover, with FFT-VI the mesh generation is performed automatically and is very efficient and robust. The adoption of the FFT allows for significantly reducing the computation time and the memory requirements, therefore making simulations with several millions of unknowns feasible. Numerical results show that, in terms of numerical performances, the FFT-VI method applied to challenging electromagnetic problems in representative MCF devices is markedly superior with respect to the state of the art VI techniques. A sample implementation of FFT-VI is made publicly available.

提出了一种基于快速傅立叶变换（FFT）的体积积分（VI）方程方法，用于大型磁约束聚变（MCF）设备中复杂系统的电磁仿真。这种FFT-VI可以极大地减少使CAD输入文件适应适用于电磁仿真的模型所需的时间和人力。此外，借助FFT-VI，网格生成是自动执行的，非常高效且强大。FFT的采用可显着减少计算时间和内存需求，因此使具有数百万个未知数的仿真成为可能。数值结果表明，就数值性能而言，相对于最新的VI技术，用于代表性MCF设备中具有挑战性的电磁问题的FFT-VI方法具有显着优势。FFT-VI的示例实现已公开提供。